/* The AI Playbook — builds on site.css + sub.css */
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.hero-meta span{border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.05);border-radius:999px;padding:8px 16px;font-size:14px;color:rgba(255,255,255,.8)}
.hero-meta b{color:#fff;font-weight:800;margin-right:4px}

/* sticky chapter bar */
.toc{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:rgba(14,27,44,.94);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08)}
.toc-in{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding-top:8px;padding-bottom:8px}
.toc-in::-webkit-scrollbar{display:none}
.toc a{flex:none;color:rgba(255,255,255,.72);text-decoration:none;font-size:13px;font-weight:600;padding:8px 12px;border-radius:999px;min-height:36px;display:inline-flex;align-items:center}
.toc a:hover{background:rgba(255,255,255,.08);color:#fff}
section[id]{scroll-margin-top:64px}

/* chapter label */
.chap{display:flex;align-items:center;gap:12px;font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--azure);margin-bottom:18px}
.chap span{border:1px solid currentColor;border-radius:999px;padding:4px 10px;letter-spacing:.12em}
.chap.dk{color:var(--blue)}

/* chapter 1 */
.big{position:relative;font-family:"Gilda Display",Georgia,serif;font-weight:400;font-size:clamp(34px,5vw,58px);line-height:1.06;margin:0 0 40px;max-width:820px;text-wrap:balance}
.four{position:relative;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:f}
.four li{counter-increment:f;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:10px}
.four li::before{content:counter(f);font-family:"Gilda Display",Georgia,serif;font-size:40px;line-height:1;color:var(--cyan)}
.four b{font-size:18px;line-height:1.3}
.four span{color:rgba(255,255,255,.75);font-size:15px}

/* chapter 2 */
.tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.tool{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:0 6px 30px rgba(31,58,95,.06);display:flex;flex-direction:column;gap:10px}
.tool h3{font-family:"Gilda Display",Georgia,serif;font-weight:400;font-size:32px;color:var(--navy);margin:0}
.tool p{color:var(--slate);font-size:16px}
.tool .fit{margin-top:auto;font-size:14px;font-weight:600;color:var(--navy);background:var(--paper);border-radius:10px;padding:10px 12px}
.tool.pick-me{border:2px solid var(--blue)}
.badge{align-self:flex-start;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#fff;background:var(--grad);border-radius:999px;padding:4px 10px}
.callout{margin-top:22px;background:var(--wash);border-radius:14px;padding:18px 22px;font-size:16px;color:var(--ink)}

/* chapter 3 */
.setup{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
.prompt.about{position:sticky;top:80px}
.prompt.about p{white-space:pre-line}

/* chapter 4 */
.compare{display:grid;grid-template-columns:.8fr 1.2fr;gap:16px;margin-bottom:22px}
.compare>div{border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:10px}
.compare .weak{background:var(--paper);border:1px solid var(--line)}
.compare .strong{background:var(--navy);color:#fff}
.compare .lab{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--slate)}
.compare .strong .lab{color:var(--azure)}
.compare p{font-size:17px;line-height:1.6}
.compare .strong p{color:rgba(255,255,255,.9)}
.compare mark{background:none;color:var(--cyan);font-weight:700}
.compare em{font-style:normal;font-size:14px;color:var(--slate)}
.compare .strong em{color:var(--ok,#6fe3a6)}
.formula{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin-bottom:44px}
.formula div{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff;display:flex;flex-direction:column}
.formula b{color:var(--blue);font-size:16px}
.formula span{color:var(--slate);font-size:14px}
.minor{font-size:22px;font-weight:800;color:var(--navy);margin:0 0 16px}
.moves{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:14px}
.move{border-left:3px solid var(--azure);padding:6px 0 6px 16px;display:flex;flex-direction:column;gap:4px}
.move b{color:var(--navy);font-size:17px}
.move span{color:var(--slate);font-size:15px}

/* chapter 5 */
.weeks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.week{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:10px;box-shadow:0 6px 30px rgba(31,58,95,.06)}
.wk{font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--blue)}
.week h3{font-size:20px;font-weight:800;color:var(--navy);margin:0;line-height:1.25}
.week ul{margin:0;padding-left:18px;color:var(--slate);font-size:15px;display:flex;flex-direction:column;gap:6px}
.sign{margin-top:auto;background:var(--wash);border-radius:10px;padding:10px 12px;font-size:14px;color:var(--ink)}

/* chapters 6 and 7: pickers */
.roles,.ptabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.pickbtn{min-height:44px;padding:0 18px;border:1px solid #cfd8e3;border-radius:999px;background:#fff;font:600 15px Inter,system-ui,sans-serif;color:var(--ink);cursor:pointer;transition:all .2s}
.pickbtn:hover{border-color:var(--blue)}
.pickbtn:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(46,107,214,.25)}
.pickbtn[aria-selected="true"]{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 6px 18px rgba(46,107,214,.3)}
.handoffs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:22px}
.prompt .n{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--blue);margin-bottom:4px}
.prompt.audit{border:2px dashed #cfd8e3;box-shadow:none}
#plist{grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr))}

/* chapter 8 */
.levels{display:flex;flex-direction:column;gap:28px}
.level{display:grid;grid-template-columns:240px 1fr;gap:24px;padding-top:24px;border-top:1px solid var(--line)}
.lvl{font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--blue)}
.lvl-head h3{font-family:"Gilda Display",Georgia,serif;font-weight:400;font-size:26px;line-height:1.15;color:var(--navy);margin:8px 0 0}
.cases{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:14px}
.case{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:flex;flex-direction:column;gap:6px}
.case b{color:var(--navy);font-size:16px}
.case p{color:var(--slate);font-size:14.5px}
.case .tags{margin-top:auto;padding-top:6px}

/* chapter 9 */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.two-col .sec-head{margin-bottom:24px}
.rules6{display:grid;gap:12px}
.rules6 .r{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;display:flex;flex-direction:column;gap:4px}
.rules6 b{color:var(--navy);font-size:16px}
.rules6 span{color:var(--slate);font-size:15px}
.mistakes{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.mistakes li{position:relative;padding:14px 18px 14px 46px;background:#fff;border:1px solid var(--line);border-radius:14px;font-size:15.5px;color:var(--slate)}
.mistakes li::before{content:"✕";position:absolute;left:18px;top:14px;color:var(--violet);font-weight:800}
.mistakes b{color:var(--navy)}

@media (max-width:1000px){
  .four,.weeks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tools,.handoffs{grid-template-columns:minmax(0,1fr)}
  .formula{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:800px){
  .setup,.compare,.two-col,.level{grid-template-columns:minmax(0,1fr)}
  .prompt.about{position:static}
  .level{gap:14px}
}
@media (max-width:560px){
  .four,.weeks,.formula{grid-template-columns:minmax(0,1fr)}
  .hero-meta span{font-size:13px;padding:6px 12px}
  .compare p{font-size:15.5px}
}